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# Algebra-Unit 1

### Unit 1 Vocab

Term | Definition |
---|---|

proportion | an equation that states that two ratios are equal |

cross products | the product of numbers on the diagonal when comparing two ratios |

ratio | a comparison of two quantities by division |

rate | a ratio that compares two quantities measured in different units |

unit rate | a rate in which the second quantity in the comparison is one |

conversion factor | a fraction whose numerator and denominator represent the same quantity but use different rates; the fraction is equal to 1 because the numerator and denominator are equal |

unit analysis | a method of changing one unit of measure to another |

literal equation | an equation where variables represent known values |

formula | a rule showing relationships among quantities |

equivalent equations | equations having exactly the same solution |

inverse operations | operations that undo each other |

simplify | to write a fraction or expression in simplest form |

algebraic expression | an expression that contains at least one variable |

like terms | two or more terms that have the same variable raised to the same power |

evaluate | to find the value of a numerical or algebraic expression |

real numbers | a rational or irrational number |

rational number | any number that can be expressed as a ratio of two integers |

irrational number | a number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal. |

square root | a number that is multiplied by itself to form a product |

perfect square | a number that has integers as its square roots |

Created by:
heather.lander